CVE-2026-18252 json
Inclusion of Functionality from Untrusted Control Sphere in GitLab
published 2026-08-26 2 mo ago modified 2026-09-10 59 d ago also BIT-gitlab-2026-18252 , EUVD-2026-66428
- cvss
- 7.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
Patch / fix
- bitnami gitlab 19.1.7, 19.2.5, 19.3.1
- GitLab GitLab 19.1.7, 19.2.5, 19.3.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3863650 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| OSV | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=18.9.0, <19.1.7 >=19.2.0, <19.2.5 >=19.3.0, <19.3.1 |
19.1.7 19.2.5 19.3.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-829 Inclusion of Functionality from Untrusted Control Sphere
- Technology feeds
References
-
hackerone.com
/reports/3863650
technical-description, exploit, permissions-required, third-party-advisory, advisory
-
docs.gitlab.com
/releases/patches/patch-release-gitlab-19-3-1-released/
release-notes, vendor-advisory, advisory
-
gitlab.com
/gitlab-org/gitlab/-/work_items/607342
issue-tracking, report
-
nvd.nist.gov
/vuln/detail/CVE-2026-18252
web
Sources
- CVE List CVE-2026-18252
- NVD CVE-2026-18252
- OSV BIT-gitlab-2026-18252
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.